Safety device for polyphase-currents machinery.



J. M', S. FONTECHA. SAFETY DEVICE POR POLYPHASE GURRENTS MACHINERY.

.A PELGATIoN FILED N012?, 190s.

Qfgs., Patented. m, i909.

. JEL S Hoven. b

Application Hsin.'

' ing of only one the current fiowing through y stallation of any numberof phases, but in' the resent state of the art it is. principally usefulfor the tri-phase system.- Yet it is clear that should the advances ofscience produce advantageous appllications of 4, 5, 6, or more phasesexactly t e same arrangement, with suitable cross-connections will, uponthe failure of one phase, quickly break all the `other phases, or, atleast, all but one.

The more mechanical details of the apparatus here descr-ibed .such asthe crossliead, the contact plunger, and the plungerpot, as well as .theessentially electrical details such as the Huid-filled contact-vessel,

and the safety fuse, may be varied as to construction in many wayswithoutA aecting the inventive idea here embodied, which consists mainlyin the arrangement of the wir! ing on the apparatus, by which a gap ispro vvided in a connection between any two phases, which willfbeautomatically and instantly closed upon failure of current in the third.

I claim:

l.` A safety device `forpolyphase current machinery consisting of vmeanscontrolled and operated by eachjphase for automatically connectingtogether two other pllases upon failure of current in a third ase.

2. A safety device for polyphase' current vmachinery consisting of meanscontrolled and operated by ,each phase for automatica y short-circuitingtwo 'complete Aphases u'pon interruption of 'current in a third phase.

A safety device for tri-phase current machinery consisting of meanscontrolled und operated by each phase independent-ly of the others, forautomatically connecting An extension of thisv .arrangement will providesafety to an intogether the two other phases .upon failure of current inany one phase.

A safety device for tri-phase current machinery consisting of nie-anscontrolled and operated by each phase independently of the others, forautomatically short-circuiting two complet-e phases upon interruption ofcurrent in the third phase.

5.. Ina safety device for tri-phase current machinery a safety fusein'each phase, and means' ineach circuit, controlled and op erated bythe current of said circuit for auto matically short-circuiting the twoother cii^- cuits upon `failure `of". current in one circuit.

6. In' a safety ldevice for tri-phase current machinery 'a device ineach phase maintainl in normally .by action .of the current in, saidphase a gap in a short-circuit connec tion between the two other phasesas long said circuit remains complete, and automaticallyclosing said gapupon failure' of current in said circuit. l,

7. In a safety device for tri-phase current machinery a solenoid in eachphase, an electric connection between the core of said solenoid and oneof the two remaining phases, a contact connected with the btner of said.Y

remaining two phases, ineens for normally keeping said core fromelectrical connection with said contact, and. for automatically closingthe said connection upon 'failure of current in said phase.

8. Ina safet device for tri-phase current machinery a so encid in eachphase, an elec tric connection between-the core of said selenA oid andone of the two remaining phases, a

. lContact plunger attached to said core, a ccntact-pot containing aconducting liquid, ,cicctric connection between said conducting liquidand the other of said two remaining phases, the said plunger of suchlength that when said core is sucked up by the soieuoid it will be clearof said conducting liquid, but that when it is dropped by thecle-magnetization of said solenoid its end will dip into said conductingliquid.

In testimony, that l claim the foregoing as my invention, l have signedmy name in presence of two subscribing witnesses,

JUAN MANUEL SANCHEZ- FGNTEHA. lVitnesses:

FLO.A Uranus Cronicas, E. M. JuLis.

